Low power wideband switching array element

Details Low power wideband switching array element Low power wideband switching array element

H - Electricity

03

K

344/54

H03K 17/62 (2006.01) H03K 17/60 (2006.01)

Patent

CA 1222311

- 12 - A LOW POWER WIDEBAND SWITCHING ARRAY ELEMENT Abstract A switching array comprising low power switching elements for switching high bandwidth pulse encoded signals with minimum distortion. Each switching element comprises an emitter-coupled pair of transistors which are used to switch the pulse encoded signals. The pair of transistors are enabled and disabled by inhibiting the flow of electrical current through the latter. A transistorized switch controls the electrical current in the pair of transistors in response to signals from a control register within the switching array. Since no current is flowing in the pair of transistors when the element is inhibited, the power dissipation approaches zero in the inhibit state resulting in an overall low power dissipation for the switching array since only a small number of elements are normally enabled at any time. Each element further comprises an emitter-follower transistor for the purpose of isolating the pair of transistors from the remainder of the switching array in order to reduce the crosstalk between pulse encoded signals.

460106

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